The Old Roads

 

The Old Roads are a series of temporal gates created long ago, made to expedite travel between two or more points. Entry and exit can only be made at certain points along the roads and each has its own requirements for entry, although exiting has no requirements. These locations and what is needed for entry is kept a closely guarded secret by the few that know. 

While travel times between two points on the roads is greatly decreased, it isn't instantaneous. It roughly lets you travel a full days distance in only two hours. The Old Roads are an extradimensional space, separate from the known planes, but still slightly connected to the Material Plane. Travelers can see the world around them, although it is a hazy, blurred landscape, but they are invisible to those on the Material Plane.  

The entry points were originally at points of importance, usually cities or forts. While some of the entry points are surrounded by ruins, others are completely lost to time, sitting in an open field or a tree line.